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NDQ_018840 | the frequency of a wave is the same as the frequency of vibrations that caused the wave. | a. true, b. false | a | Lesson: wave frequency
What Is Wave Frequency:
The number of waves that pass a fixed point in a given amount of time is wave frequency. Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the g... |
NDQ_018841 | for waves of the same amplitude, a higher frequency wave has less energy than a shorter frequency wave. | a. true, b. false | b | Lesson: wave frequency
What Is Wave Frequency:
The number of waves that pass a fixed point in a given amount of time is wave frequency. Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the g... |
NDQ_018842 | if 20 waves pass a fixed point in 10 seconds, the frequency of the waves is | a. 200 hz, b. 100 hz, c. 20 hz, d. 2 hz | d | Lesson: wave frequency
What Is Wave Frequency:
The number of waves that pass a fixed point in a given amount of time is wave frequency. Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the g... |
NDQ_018843 | the frequency of four different waves is listed below. which wave has the most energy? | a. 2000 hz, b. 1000 hz, c. 200 hz, d. 20 hz | a | Lesson: wave frequency
What Is Wave Frequency:
The number of waves that pass a fixed point in a given amount of time is wave frequency. Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the g... |
NDQ_018845 | wave interactions refer to interactions between a wave and | a. another wave, b. its reflected wave, c. its medium, d. none of the above | c | Lesson: wave interactions
What Are Atoms:
Atoms are the building blocks of matter. Unlike blocks that we know, these building blocks are incredibly small. In fact, they are the smallest particles of an element. Atoms still have the same properties as the elements they make up. For example, an atom of gold has the same... |
NDQ_018847 | types of wave interactions include | a. reflection, b. refraction, c. diffraction, d. all of the above | d | Lesson: wave interactions
What Are Atoms:
Atoms are the building blocks of matter. Unlike blocks that we know, these building blocks are incredibly small. In fact, they are the smallest particles of an element. Atoms still have the same properties as the elements they make up. For example, an atom of gold has the same... |
NDQ_018850 | only sound waves can be reflected. | a. true, b. false | b | Lesson: wave interactions
What Are Atoms:
Atoms are the building blocks of matter. Unlike blocks that we know, these building blocks are incredibly small. In fact, they are the smallest particles of an element. Atoms still have the same properties as the elements they make up. For example, an atom of gold has the same... |
NDQ_018852 | refraction occurs because waves change speed in a new medium. | a. true, b. false | a | Lesson: wave interactions
What Are Atoms:
Atoms are the building blocks of matter. Unlike blocks that we know, these building blocks are incredibly small. In fact, they are the smallest particles of an element. Atoms still have the same properties as the elements they make up. For example, an atom of gold has the same... |
NDQ_018854 | wave diffraction depends on the | a. size of the obstacle or opening, b. wavelength of the waves, c. speed of the waves, d. two of the above | d | Lesson: wave interactions
What Are Atoms:
Atoms are the building blocks of matter. Unlike blocks that we know, these building blocks are incredibly small. In fact, they are the smallest particles of an element. Atoms still have the same properties as the elements they make up. For example, an atom of gold has the same... |
NDQ_018855 | wave interference refers to wave interactions that can occur between a wave and | a. another wave, b. its reflected wave, c. its medium, d. two of the above | d | Lesson: wave interference
When Waves Meet:
When two or more waves meet, they interact with each other. The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. The two waves pass through each other, and this affect... |
NDQ_018856 | when two waves pass through each other in opposite directions, the interference affects their | a. amplitude, b. frequency, c. wavelength, d. two of the above | a | Lesson: wave interference
When Waves Meet:
When two or more waves meet, they interact with each other. The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. The two waves pass through each other, and this affect... |
NDQ_018860 | constructive interference occurs when the crests of one wave overlap the troughs of the other wave. | a. true, b. false | b | Lesson: wave interference
When Waves Meet:
When two or more waves meet, they interact with each other. The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. The two waves pass through each other, and this affect... |
NDQ_018861 | destructive interference occurs when the crests of two waves overlap. | a. true, b. false | b | Lesson: wave interference
When Waves Meet:
When two or more waves meet, they interact with each other. The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. The two waves pass through each other, and this affect... |
NDQ_018864 | standing waves form only when waves reflect at a 90-degree angle. | a. true, b. false | a | Lesson: wave interference
When Waves Meet:
When two or more waves meet, they interact with each other. The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. The two waves pass through each other, and this affect... |
NDQ_018868 | before einstein, all scientists thought that electromagnetic energy consists of waves. | a. true, b. false | b | Lesson: wave particle theory
The Question:
Electromagnetic radiation, commonly called light, is the transfer of energy by waves called electromagnetic waves. These waves consist of vibrating electric and magnetic fields. Where does electromagnetic energy come from? It is released when electrons return to lower energy ... |
NDQ_018870 | einstein based his wave-particle theory on experimental evidence. | a. true, b. false | b | Lesson: wave particle theory
The Question:
Electromagnetic radiation, commonly called light, is the transfer of energy by waves called electromagnetic waves. These waves consist of vibrating electric and magnetic fields. Where does electromagnetic energy come from? It is released when electrons return to lower energy ... |
NDQ_018871 | the double-slit experiments showed that light | a. consists of particles, b. behaves like a wave, c. requires a medium, d. two of the above | d | Lesson: wave particle theory
The Question:
Electromagnetic radiation, commonly called light, is the transfer of energy by waves called electromagnetic waves. These waves consist of vibrating electric and magnetic fields. Where does electromagnetic energy come from? It is released when electrons return to lower energy ... |
NDQ_018874 | photons create interference patterns just as waves do. | a. true, b. false | a | Lesson: wave particle theory
The Question:
Electromagnetic radiation, commonly called light, is the transfer of energy by waves called electromagnetic waves. These waves consist of vibrating electric and magnetic fields. Where does electromagnetic energy come from? It is released when electrons return to lower energy ... |
NDQ_018876 | speed can be calculated with the equation | a. speed = distance x time, b. speed = distance/time, c. speed = time/distance, d. none of the above | b | Lesson: wave speed
The Speed of a Wave:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time
Wave Speed Wavelength and Wave Frequency:
Wave speed is related ... |
NDQ_018878 | which equation correctly shows the relationship between wave speed, wavelength, and wave frequency? | a. wave speed = wavelength x wave frequency, b. wave speed = wavelength/wave frequency, c. wave speed = wave frequency/wavelength, d. none of the above | a | Lesson: wave speed
The Speed of a Wave:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time
Wave Speed Wavelength and Wave Frequency:
Wave speed is related ... |
NDQ_018879 | light always travels at the same speed, but it can have different frequencies and wavelengths. if the frequency of light decreases, its wavelength | a. increases, b. decreases, c. stays the same, d. may increase or decrease | a | Lesson: wave speed
The Speed of a Wave:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time
Wave Speed Wavelength and Wave Frequency:
Wave speed is related ... |
NDQ_018880 | the wavelengths of four different waves are listed below. if all four waves have the same speed, which wave has the highest frequency? | a. wave a: 0.001 m, b. wave b: 0.01 m, c. wave c: 0.1 m, d. wave d: 1.0 m | a | Lesson: wave speed
The Speed of a Wave:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time
Wave Speed Wavelength and Wave Frequency:
Wave speed is related ... |
NDQ_018883 | the speed of most waves depends on the medium. | a. true, b. false | a | Lesson: wave speed
The Speed of a Wave:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time
Wave Speed Wavelength and Wave Frequency:
Wave speed is related ... |
NDQ_018884 | waves generally travel fastest through gases and slowest through solids. | a. true, b. false | b | Lesson: wave speed
The Speed of a Wave:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time
Wave Speed Wavelength and Wave Frequency:
Wave speed is related ... |
NDQ_018887 | the wavelength of visible light determines its color. | a. true, b. false | a | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018888 | wavelength usually is measured in meters. | a. true, b. false | a | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018889 | in a transverse wave, wavelength can be measured as the distance between | a. two adjacent crests, b. a crest and the adjacent trough, c. a crest and the resting position, d. none of the above | a | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018890 | in a longitudinal wave, wavelength can be measured as the distance between | a. two adjacent compressions, b. two adjacent rarefactions, c. a compression and the adjacent rarefaction, d. two of the above | d | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018891 | for waves of the same amplitude, shorter wavelength waves have less energy than longer wavelength waves. | a. true, b. false | b | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018892 | which color of visible light has the longest wavelength? | a. red, b. orange, c. yellow, d. green | a | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018893 | which color of visible light has the most energy? | a. red, b. green, c. blue, d. violet | d | Lesson: wavelength
Defining Wavelength:
Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. In a transverse wave, particles of t... |
NDQ_018895 | a wedge is a type of compound machine. | a. true, b. false | b | Lesson: wedge
What Is A Wedge:
A wedge is simple machine that consists of two inclined planes, giving it a thin end and thick end, as you can see in the Figure 1.1. A wedge is used to cut or split apart objects. Force is applied to the thick end of the wedge, and the wedge, in turn, applies force to the object along b... |
NDQ_018896 | examples of wedges include | a. chisels, b. knives, c. scissor blades, d. all of the above | d | Lesson: wedge
What Is A Wedge:
A wedge is simple machine that consists of two inclined planes, giving it a thin end and thick end, as you can see in the Figure 1.1. A wedge is used to cut or split apart objects. Force is applied to the thick end of the wedge, and the wedge, in turn, applies force to the object along b... |
NDQ_018897 | a wedge | a. consists of two inclined planes, b. has two thin ends and a thick center, c. is used to hold objects together, d. none of the above | a | Lesson: wedge
What Is A Wedge:
A wedge is simple machine that consists of two inclined planes, giving it a thin end and thick end, as you can see in the Figure 1.1. A wedge is used to cut or split apart objects. Force is applied to the thick end of the wedge, and the wedge, in turn, applies force to the object along b... |
NDQ_018901 | the ratio of output force to input force for a wedge is always less than 1. | a. true, b. false | b | Lesson: wedge
What Is A Wedge:
A wedge is simple machine that consists of two inclined planes, giving it a thin end and thick end, as you can see in the Figure 1.1. A wedge is used to cut or split apart objects. Force is applied to the thick end of the wedge, and the wedge, in turn, applies force to the object along b... |
NDQ_018902 | a longer thinner wedge has a greater mechanical advantage than a shorter thicker wedge. | a. true, b. false | a | Lesson: wedge
What Is A Wedge:
A wedge is simple machine that consists of two inclined planes, giving it a thin end and thick end, as you can see in the Figure 1.1. A wedge is used to cut or split apart objects. Force is applied to the thick end of the wedge, and the wedge, in turn, applies force to the object along b... |
NDQ_018903 | a wedge with a greater mechanical advantage can do the same amount of work with less input force than a wedge with a lesser mechanical advantage. | a. true, b. false | a | Lesson: wedge
What Is A Wedge:
A wedge is simple machine that consists of two inclined planes, giving it a thin end and thick end, as you can see in the Figure 1.1. A wedge is used to cut or split apart objects. Force is applied to the thick end of the wedge, and the wedge, in turn, applies force to the object along b... |
NDQ_018906 | examples of wheels and axles include | a. ferris wheels, b. doorknobs, c. steering wheels, d. all of the above | d | Lesson: wheel and axle
Round and Round It Goes:
A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the w... |
NDQ_018909 | the input force may be applied either to the wheel or the axle of a wheel and axle. | a. true, b. false | a | Lesson: wheel and axle
Round and Round It Goes:
A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the w... |
NDQ_018910 | a wheel and axle changes the direction of the input force. | a. true, b. false | b | Lesson: wheel and axle
Round and Round It Goes:
A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the w... |
NDQ_018912 | which statement about a ferris wheel is true? | a. the input force is applied to the axle, b. the input force is less than the output force, c. the output distance is shorter than the input distance, d. none of the above | a | Lesson: wheel and axle
Round and Round It Goes:
A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the w... |
NDQ_018913 | which statement about a doorknob is false? | a. the input force is applied to the wheel, b. the input force is greater than the output force, c. the mechanical advantage is greater than 1, d. the input distance is longer than the output distance | b | Lesson: wheel and axle
Round and Round It Goes:
A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the w... |
NDQ_018914 | a wheel and axle may either increase or decrease the input force. | a. true, b. false | a | Lesson: wheel and axle
Round and Round It Goes:
A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the w... |
NDQ_018916 | the scientist who demonstrated in 1800 that earth is a magnet was | a. charles darwin, b. william gilbert, c. isaac newton, d. marie curie | b | Lesson: why earth is a magnet
Earth the Magnet:
Like the real Earth, the globe pictured above is a magnet. A magnet is an object that has north and south magnetic poles and a magnetic field. The magnetic globe is a modern device, but the idea that Earth is a magnet is far from new. It was first proposed in 1600 by a B... |
NDQ_018917 | earths magnetic north pole is located at 90 degrees north latitude. | a. true, b. false | b | Lesson: why earth is a magnet
Earth the Magnet:
Like the real Earth, the globe pictured above is a magnet. A magnet is an object that has north and south magnetic poles and a magnetic field. The magnetic globe is a modern device, but the idea that Earth is a magnet is far from new. It was first proposed in 1600 by a B... |
NDQ_018919 | how do the lines of force move in earths magnetic field? | a. from north to south magnetic poles, b. from south to north magnetic poles, c. in circles parallel to the equator, d. none of the above | a | Lesson: why earth is a magnet
Earth the Magnet:
Like the real Earth, the globe pictured above is a magnet. A magnet is an object that has north and south magnetic poles and a magnetic field. The magnetic globe is a modern device, but the idea that Earth is a magnet is far from new. It was first proposed in 1600 by a B... |
NDQ_018922 | what have scientists learned about why earth is a magnet? | a. earths magnetism is caused by the movement of charged particles, b. earths magnetism is generated in molten metals in the core, c. earths magnetism occurs because the planet is spinning on its axis, d. all of the above | d | Lesson: why earth is a magnet
Earth the Magnet:
Like the real Earth, the globe pictured above is a magnet. A magnet is an object that has north and south magnetic poles and a magnetic field. The magnetic globe is a modern device, but the idea that Earth is a magnet is far from new. It was first proposed in 1600 by a B... |
NDQ_018923 | earth has a liquid inner core and solid outer core. | a. true, b. false | b | Lesson: why earth is a magnet
Earth the Magnet:
Like the real Earth, the globe pictured above is a magnet. A magnet is an object that has north and south magnetic poles and a magnetic field. The magnetic globe is a modern device, but the idea that Earth is a magnet is far from new. It was first proposed in 1600 by a B... |
NDQ_018936 | any force that is used to move an object does work. | a. true, b. false | b | Lesson: work
Defining Work:
Work is defined differently in physics than in everyday language. In physics, work means the use of force to move an object. The teens who are playing basketball in the picture above are using force to move their bodies and the basketball, so they are doing work. The teen who is studying is... |
NDQ_018937 | work is done when force is applied | a. for a long enough period of time, b. in the opposite direction that the object moves, c. in the same direction that the object moves, d. two of the above | c | Lesson: work
Defining Work:
Work is defined differently in physics than in everyday language. In physics, work means the use of force to move an object. The teens who are playing basketball in the picture above are using force to move their bodies and the basketball, so they are doing work. The teen who is studying is... |
NDQ_018939 | the amount of work done depends on the | a. amount of force applied, b. distance the object moves, c. speed with which the object moves, d. two of the above | d | Lesson: work
Defining Work:
Work is defined differently in physics than in everyday language. In physics, work means the use of force to move an object. The teens who are playing basketball in the picture above are using force to move their bodies and the basketball, so they are doing work. The teen who is studying is... |
NDQ_018941 | you do more work lifting an object if the object is | a. heavier, b. bigger, c. harder, d. warmer | a | Lesson: work
Defining Work:
Work is defined differently in physics than in everyday language. In physics, work means the use of force to move an object. The teens who are playing basketball in the picture above are using force to move their bodies and the basketball, so they are doing work. The teen who is studying is... |
NDQ_018943 | you do more work playing basketball than you do studying for a test. | a. true, b. false | a | Lesson: work
Defining Work:
Work is defined differently in physics than in everyday language. In physics, work means the use of force to move an object. The teens who are playing basketball in the picture above are using force to move their bodies and the basketball, so they are doing work. The teen who is studying is... |
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